Otto steuee



UNITED Srnrns OTTO STEUER, OF DRESDEN, SAXONY, GERMANY, ASSIGNOR TOJACOB RUTSEN PALEN, OF SAME PLACE.

REPRODUCING WRITINGS, 80C.

SPECIFICATION forming part of Letters Patent No. 356,296, dated January18, 1887.

Application tiled February 23, 1886. Serial No. 192,908. (No specimens.)Patented in Germany October 14, 1884, No. 31,821, and in EnglandNovember 8, 1884, No. 14,756.

To aZZ'whom it may concern.-

Be it known that I, OTTO STEUER, of the city ot'Dresden, in the Kingdomof Saxony and German Empire, have invented certain new and usefulimprovements in the process of reproducing wood-cuts, type-writings, andother printed matter direct from the original, (for which a patent wasgranted to me in Germany under No. 31,821, bearing datethe 14thofOc-tober, 1884, and in England under No. 14,756, hearing date the 8thof November, 1884,) of which I declare the following to be aspecification.

My inventionrelates to an improved process for producing manifold copiesof printed matter, type-writings, wood-cuts, and other matter.

In order to effect the manifold reproduction of such said printedmatter, engravings, woodcuts, and other matter, the object to be repro=duced is first well saturated with a protective solution composed ofglycerine, tannic acid, and water, then well rinsed with water, and theparts to be reproduced treated with autographic ink by means of asuitable inkingroller or in other appropriate manner.

In consequence of the previous treament of theoriginal with theprotective preparation, ink will only adhere to those parts covered byprinters ink, whereas those parts left free are protected by the saidpreparation from taking up any quantity of ink. The positive so producedor written or drawn in autographic ink is now laid on abrightly-polished metallic plate or lithographic stone and repeatedlypassed through the rollers of my improved press, as described in thespecification relating thereto, so as to transfer the autographic ink ofthe positive to the said brightly-polished metallic plate orlithographic stone, thus producing a negative copy on the said plate orstone. After the said metallic plate or lithographic stone has beenprovided, as aforementioned, with the negative of the original writing,drawing, or printed matter in autographic ink, the saidbrightly-polished metallic plate or lithographic stone is treated withthe aforenamed protective mixture of glycerine, tannic acid,andwater,and is then provided with ink by means of a suitable inking-rolleror in other appropriate manner. I prefer to ink the said plate orlithographic stone by passing the same repeatedly between the upper orinking roller and the middle roller of my improved press, which is thesubject of a separate application filed Oct ober 2, 1885, hear ingserial number 178,848.

The paper or other matter to which the ink adhering to the negative onthe brightly-polished metallic plate or lithographic stone is to betransferred is now placed over the said negative'and passed between thepressure-rollers of a suitable press, whereby the exact and true on theaforesaid paper or other matter. After v the paper has been removed, thebrightly-polished metallic plate or lithographic stone is again inked,paper applied to the surface of the same, and a second copy produced inlike manner as aforesaid, and so on, so that many hundreds ofreproductions or copies can be produced which are in all respectsperfect facsimiles of the original engraving or printed,

drawn, or written matter.

' Having now particularly described and ascertained the nature of myinvention and in what manner the same is to be performed, what I claimis- The process of reproducing printed matter, type-writings, wood-cuts,and other rinted matter direct from the original by saturating such saidmatter with a protective mixture of glycerine, tannic acid, and water,rinsing the same in water, treating the same with an autographic ink,and transferring the same to the negative plate, substantially as andfor the purpose described in the foregoing specification.

In witness whereof I have hereunto signed my name in the presence of twosubscribing witnesses.

OTTO STEUER.

Witnesses:

Or'ro WOLFF, PAUL DRUoKMiiLLER.

